Back in the early 80s, Apple developed a variety of unique conventions to make the Macintosh intuitively easy to use, almost to a magical extent. One example pertains to invisible file metadata that helped the system identify documents using Type and Creator Codes. Each file was tagged with both a Type and a Creator, allowing the system to distinguish between applications that could open a file an
![Inside Snow Leopard's UTI: Apple fixes the Creator Code | AppleInsider](https://cdn-ak-scissors.b.st-hatena.com/image/square/9b76f1453bac0a7b5b5fe9d352e72422c8ecd6a3/height=288;version=1;width=512/https%3A%2F%2Fphotos2.insidercdn.com%2Futi092209.1.png)